JP3299072B2 - Flexible flat cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible flat cable used for various kinds of electric wiring, and in particular, a metal terminal is connected to a terminal of a conductor.

[0002]

2. Description of the Related Art In a conventional flexible flat cable of this type, a plurality of flat conductors are adhered on both sides with insulating sheets, and these insulating sheets are formed by removing the outer shape. A so-called terminal treatment is often performed on the terminal portion of the conductor of such a flexible flat cable, in which a metal terminal is connected by welding or the like. In this case, the metal terminal is welded only to the conductive one of the conductors of the flexible flat cable.

For example, as shown in a partially cutaway plan view of FIG. 4, in a flexible flat cable 1, insulating sheets 3 and 4 are adhered to both sides of a plurality of flat conductors 2 and these insulating sheets 3 and 4 have outer shapes. It is formed by punching. For example, a terminal block 5 is connected to the flexible flat cable 1 formed as described above. In the terminal block 5, metal terminals 6 arranged in parallel at equal intervals corresponding to the respective conductors 2 of the flexible flat cable 1 are molded by a connecting member 7 made of a synthetic resin material.

[0005] As shown in the sectional view of FIG. 5, after the metal terminals 6 of the terminal block 5 are respectively superposed on the conductor 2 of the flexible flat cable 1, the respective superposed portions are welded by a welding machine 8.

Since the metal terminals 6 are welded only to the necessary conductors 2 of the conductors 2 of the flexible flat cable 1, the terminal block 5 is cut into a required size according to the number of the metal terminals 6. Provided for use.

[0006]

However, in the conventional example described above, the metal terminals 6 of the terminal block 5 are welded only to the required number of conductors 2 of the flexible flat cable 1, so that the following problems occur. appear.

(1) Since the current load of the welding machine 8 varies depending on the number of welding locations, the conditions of the welding machine 8 must be changed according to the required number of conductors 2.

(2) Since the terminal block 5 must be positioned in accordance with the increase or decrease in the required number of conductors 2, the positioning may be erroneous or the terminal block 5 itself may need to be replaced. . .

(3) Since the width of the flexible flat cable 1 and the width of the terminal block 5 may be different from each other, the balance between the flexible flat cable 1 and the terminal block 5 is lost, and an error occurs when the terminal block 5 is inserted into the connector. Easy to occur.

(4) Further, when the welded portion including the terminal block 5 is molded with a synthetic resin after welding, if there is a portion that is not to be welded, the flat cable 1 may be biased and other welding portions may be peeled off. is there.

SUMMARY OF THE INVENTION An object of the present invention is to provide a flexible flat cable which can solve the above-mentioned problems and can easily and surely connect metal terminals and can connect them in a well-balanced state. It is in.

[0012]

According to the present invention, there is provided a flexible flat cable having a plurality of flat conductors arranged side by side at a terminal portion, and an arbitrary number of the conductors. It is arranged as a pseudo conductor in a non-conducting state interrupted on the way, both sides of the flat conductor are sandwiched by insulating sheets, the insulating sheet is cut out in a predetermined shape, and ends of the conductor including the pseudo conductor are included. A metal terminal is connected to each of the portions.

[0013]

In the flexible flat cable having the above-described structure, the ends of the present conductor and the pseudo conductor are arranged at equal intervals, and the pseudo conductor is interrupted on the way. Even when a potential is applied, no current flows through the pseudo conductor.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the embodiments shown in FIGS. FIG. 1 is a partially cutaway plan view of the first embodiment. A flexible flat cable 11 includes, for example, four main conductors 12 to 15 that can conduct, and one pseudo conductor that cannot be interrupted and cannot conduct. 16 and two insulating sheets 17 and 18. Conductors 12-16
Is formed into a shape having a predetermined interval by punching a metal foil or the like, and insulating sheets 17 and 18 are adhered to both surfaces of these conductors 12 to 16, and the insulating sheets 17 and 18 are punched out to form a flexible flat sheet. A cable 11 is formed.

Here, one end 1 of all conductors 12 to 16
The positions of 2a to 16a are equally spaced. On the other hand, the other end 1 of the four continuous outer conductors 12 to 15
2b to 15b extend to the connection portion at the other end, but the other end portion 16b of the pseudo conductor 16 is interrupted.

The flexible flat cable 11 thus formed is connected to a terminal block 21 as shown in FIG.
Are connected and provided for use. In the terminal block 21,
Five metal terminals 22 to 26 made of a long plate-like metal body are
The metal terminals 22 are arranged so as to correspond to the intervals between the conductors 12 to 16 of the flexible flat cable 11.
26 are connecting members 2 made of an insulating synthetic resin material.
7 is molded. One ends of the metal terminals 22 to 26 of the terminal block 21 are connected to the connection ends 2 connected to the conductors 12 to 16 of the flexible flat cable 11, respectively.
2a to 26a, and the other end is an insertion end 22b to 26b inserted into a mating connector (not shown).

In the so-called terminal processing for connecting the terminal block 21 to the flexible flat cable 11, one end portions 12a to 16a of the flexible flat cable 11 and the connection ends 22a to 26a of the terminal block 21 are overlapped, and this overlapped portion is welded by a welding machine. Welded. In this way,
The insertion ends 22 b to 26 b of the terminal block 21 welded to the flexible flat cable 11 are inserted into the mating connector while holding the connecting member 27.

In the first embodiment, even if the number of conducting conductors 12 to 15 to be conducted is four, one pseudo conductor 16
By providing the flexible flat cable 1
The number of the one end portions 12a to 16a and the width of the flexible flat cable 11 can be made constant. For this reason, one end 12 of the flexible flat cable 11
a to 16a and connection ends 22a to 26a of the terminal block 21
Can be easily positioned at the time of polymerization.

Further, since the number of welding points can be fixed, fluctuations in the load of the welding machine can be eliminated, and it is not necessary to change the type of the welding machine. Furthermore, since the flexible flat cable 11 and the terminal block 21 have a fixed size, when they are inserted into the mating connector, they can be easily maintained in balance, and insertion errors can be eliminated.

The flexible flat cable 11
The metal terminal 22 molded by the connecting member 27
Although the metal terminals 22 to 26 are welded, the individual metal terminals 22 to 26 before being molded by the connecting member 27 can also be welded.

In the above-described embodiment, the pseudo conductor 16
However, as shown in FIG. 2, the flexible flat cable 31 can be composed of three main conductors 32 to 34, two pseudo conductors 35 and 36, and insulating sheets 37 and 38. As shown in FIG. 3, the flexible flat cable 41 may be composed of two main conductors 42 and 43, three pseudo conductors 44 to 46, and insulating sheets 47 and 48.

[0022]

As described above, in the flexible flat cable according to the present invention, the ends of the present conductor and the pseudo conductor are arranged at equal intervals at the ends thereof and the pseudo conductor is interrupted on the way. No current flows through the conductor. For this reason, even if the metal terminals are connected to one end of all the conductors, only the metal terminals connected to the main conductor can conduct, and the metal terminals connected to the pseudo conductor can be prevented from conducting.

Accordingly, since the metal terminals can be connected to all the conductors, the positioning of the metal terminals can be facilitated and the metal terminals can be securely connected. Also, when connecting metal terminals by welding, a constant load can be applied to the welding machine, so even if the number of the conductors changes, the welding machine can be changed without changing the setting conditions. In addition, since the welding position can be kept constant, mistakes at the time of welding can be eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view of an embodiment.

FIG. 2 is a plan view of a modification.

FIG. 3 is a plan view of a modification.

FIG. 4 is a plan view showing a connection state between a conventional flexible flat cable and a terminal block.

FIG. 5 is a sectional view of a conventional method for connecting a flexible flat cable and a terminal block.

[Explanation of symbols]

 11, 31, 41 Flexible flat cable 12 to 16, 32 to 34, 42, 43 Conductor 16, 35, 36, 44 to 46 Pseudo conductor 17, 18, 37, 38, 47, 48 Insulating sheet 21 Terminal block 22 to 26 metal terminals

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) H01B 7/08 H01R 4/02

Claims (1)

(57) [Claims] 1. A plurality of flat conductors are juxtaposed at a terminal portion.
While, arranged as a pseudo conductors nonconductive state data stream is divided during any number of conductors of said conductor, said polarization
The flat conductor is sandwiched on both sides with an insulating sheet,
A flexible flat cable , wherein a metal terminal is connected to an end of each of the conductors including the pseudo conductor, respectively.